Patents by Inventor Norio Ogata

Norio Ogata has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4910294
    Abstract: Disclosed is a process for producing stably a polyarylene sulfide of high purity and high molecular weight by contacting a dihalogeno aromatic compound with an alkali metal sulfide in a polar solvent which comprises, as a first stage, reacting a dihalogeno aromatic compound with an alkali metal sulfide in a polar solvent in the presence of a lithium compound and in the presence of substantially no water at C. with concentration of remaining alkali metal sulfide being 5.5 g/l-polar solvent or less in terms of sulfur; then adding water in an amount of 1.0-10 mols per 1 mol of said alkali metal sulfide; and, thereafter, as a second stage, carrying out the reaction at C. Preferred dihalogeno aromatic compound is p-dichlorobenzene, preferred alkali metal sulfide is sodium sulfide and/or lithium sulfide and preferred lithium compound is lithium chloride and/or lithium sulfide.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: March 20, 1990
    Assignee: Idemitsu Petrochemical Company Limited
    Inventors: Norio Ogata, Hiroyasu Yamato
  • Patent number: 4810773
    Abstract: Disclosed is a method for producing a polyarylene sulfide comprising contacting a dihalogenated aromatic compound with an alkali metal sulfide in a polar solvent, wherein a halogenated aromatic compound containing active hydrogen is present in the reaction system.
    Type: Grant
    Filed: August 5, 1986
    Date of Patent: March 7, 1989
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Norio Ogata, Hiroyasu Yamato, Minoru Senga
  • Patent number: 4429083
    Abstract: A process for the production of polyesterpolycarbonate is described, which comprises reacting an aqueous alkaline solution of dihydric phenol and an organic solvent solution of acid chloride to prepare polyester oligomer, mixing chloroformate group-containing polycarbonate oligomer with the polyester oligomer, and polycondensing the polyester oligomer and the polycarbonate oligomer to form the polyesterpolycarbonate.
    Type: Grant
    Filed: September 14, 1982
    Date of Patent: January 31, 1984
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Takashi Nakagawa, Norio Ogata
  • Patent number: 4366279
    Abstract: A flame retardant polycarbonate resin composition comprising a polycarbonate resin, a nuclear substituted benzoic acid containing at least one substituent selected from the group consisting of thiosalicylic acid and dihydroxy benzoic acid, and tetrabromobisphenol A or ##STR1## .
    Type: Grant
    Filed: August 19, 1981
    Date of Patent: December 28, 1982
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Tatsuya Tomioka, Norio Ogata